Nuclear fission is the splitting of a large atomic nucleus into smaller nuclei. This causes the nucleus to become uranium-236, which is violently unstable. The entire nucleus splits into two large fragments called ‘daughter nuclei ‘.

Nuclear fission is a reaction in which the nucleus of an atom splits into two or more smaller nuclei. The fission process often produces gamma photons, and releases a very large amount of energy even by the energetic standards of radioactive decay.

Nuclear Fusion reactions power the Sun and other stars. In a fusion reaction, two light nuclei merge to form a single heavier nucleus. The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei. The leftover mass becomes energy.

The Sun is losing about 6 x 1012 grams per second, and has a mass of 2 x 1033 grams. So the fraction of its mass it loses every year is about 10-13. The Earth’s orbit is 150 million kilometers, and if you multiply that by 10-13 you get about 1.5 centimeters. That’s how much bigger the Earth’s orbit gets every year!

In theoretical physics, negative mass is a type of exotic matter whose mass is of opposite sign to the mass of normal matter, e.g. −1 kg. Currently, the closest known real representative of such exotic matter is a region of negative pressure density produced by the Casimir effect.

Matter disappears during the nuclear reaction. This loss of matter is called the mass defect. The missing matter is converted into energy. The speed of light is squared, making that part of the equation a very large number that, even when multiplied by a small amount of mass, yields a large amount of energy.

No. Matter isnt destroyed in nuclear reactions. Matter is only destroyed or annhilated when it meets antimatter. In nuclear reactions either a fission or fusion occurs, in both processes releasing vast amounts of energy as new elements are created.

All matter consists of indivisible particles called atoms. Atoms of the same element are similar in shape and mass, but differ from the atoms of other elements. Atoms cannot be created or destroyed. The atom is the smallest unit of matter that can take part in a chemical reaction.

Our universe began with an explosion of space itself – the Big Bang. Starting from extremely high density and temperature, space expanded, the universe cooled, and the simplest elements formed. Gravity gradually drew matter together to form the first stars and the first galaxies.

Modern humans originated in Africa within the past 200,000 years and evolved from their most likely recent common ancestor, Homo erectus, which means ‘upright man’ in Latin. Homo erectus is an extinct species of human that lived between 1.9 million and 135,000 years ago.

Dark matter may not give off any light or radiation, but we might be able to watch it smash into atoms here on Earth. Dark matter makes up 85% of all matter in the Universe, but astronomers have never seen it. The nature of this mysterious — something — remains largely unknown.

For fission of uranium-235, the predominant radioactive fission products include isotopes of iodine, caesium, strontium, xenon and barium.

Fusion powers the Sun and stars as hydrogen atoms fuse together to form helium, and matter is converted into energy. Hydrogen, heated to very high temperatures changes from a gas to a plasma in which the negatively-charged electrons are separated from the positively-charged atomic nuclei (ions).

A nuclear fusion occurs when two atoms bombard each other to form a heavier atom, as when two hydorgen atoms combine to form a helium atom. The energy produced during a nuclear fusion is several times greater than the energy produced during a nuclear fission. …

In a fusion reaction, two light nuclei merge to form a single heavier nucleus. The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei. The leftover mass becomes energy.

Fission is the splitting of heavy nuclei (such as uranium) – in two smaller nuclei. This process needs less energy to ‘bind’ them together – so energy is released. Moving to heavier atoms, less energy is released in each fusion event; until, at iron (26 protons and 30 neutrons), no more energy is released by fusion.

In nuclear fission, atoms are split apart, which releases energy. All nuclear power plants use nuclear fission, and most nuclear power plants use uranium atoms. During nuclear fission, a neutron collides with a uranium atom and splits it, releasing a large amount of energy in the form of heat and radiation.